[英]Sending data in a GTK Callback
How can I send data through a GTK callback? 如何通过GTK回调发送数据? I've Googled, and with the information I found created this: 我已经用Google搜索了,并根据我发现的信息创建了它:
#include <gtk/gtk.h>
#include <stdio.h>
void button_clicked( GtkWidget *widget, GdkEvent *event, gchar *data);
int main( int argc, char *argv[]){
GtkWidget *window;
GtkWidget *button;
gtk_init (&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
button = gtk_button_new_with_label("Go!");
gtk_container_add(GTK_CONTAINER(window), button);
g_signal_connect_swapped(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(button_clicked),"test" );
gtk_widget_show(window);
gtk_widget_show(button);
gtk_main();
return 0;
}
void button_clicked( GtkWidget *widget, GdkEvent *event, gchar *data){
printf("%s \n", (gchar *) data);
return;
}
But it just Segfaults when I press the button. 但是当我按下按钮时,它只是Segfaults。 What is the right way to do this? 什么是正确的方法?
It segfaults because "clicked" doesn't have a GdkEvent
parameter. 发生段错误是因为“被单击”没有GdkEvent
参数。 If you remove the second argument in button_clicked()
it should work. 如果您删除button_clicked()
中的第二个参数,它应该可以工作。
Install Devhelp application from where you can easily browse GTK+ and GNOME documentation, including signal definitions. 从那里可以轻松浏览GTK +和GNOME文档(包括信号定义)来安装Devhelp应用程序。
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